Controllable growth of tellurium-based films by electrochemical deposition technique / Yang Fan

Yang , Fan (2023) Controllable growth of tellurium-based films by electrochemical deposition technique / Yang Fan. Masters thesis, Universiti Malaya.

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Abstract

Thermoelectric devices are composed of n-type and p-type materials. The purpose of this research was to study the controllability of tellurium (p-type) thin films. As for thin films, although the films are fabricated via many techniques, electrochemical deposition as one of many methods has some advantages, which can accurately control deposition parameters to obtain the corresponding film morphology and grain size. On the premise of being a material for thermoelectric microdevices, this work is aimedat growing a dense and homogeneous tellurium film in an atmospheric environment by electrodeposition at 300K. This study found that the CVcurve shifts in the positive direction with increasing deposition time. Based on the findings, we set up the initial potential and the stabilized potential to study the tellurium film. In addition, three different additives (tartaric acid, polyvinyl alcohol, and sodium lignosulfonate) have been used and the pH was adjusted to optimize the morphology of tellurium films.

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